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- Path: sparky!uunet!gatech!paladin.american.edu!howland.reston.ans.net!news.ans.net!malgudi.oar.net!hyperion!desire.wright.edu!fheitkamp
- From: fheitkamp@desire.wright.edu
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: The "cool" fan debate
- Message-ID: <1992Dec24.071534.6349@desire.wright.edu>
- Date: 24 Dec 92 07:15:34 EST
- References: <1992Dec19.101213.1@oread.cc.ukans.edu> <1992Dec22.212412.10255@trl.oz.au> <1hbjv5INNe35@uwm.edu>
- Organization: Wright State University
- Lines: 50
-
- In article <1hbjv5INNe35@uwm.edu>, bloc1469@ee.ee.uwm.edu (Gregory R Block) writes:
- > The problem is that with positive pressure airflow systems, the
- > problems come forward thusly:
- >
- > 1) It is extremely difficult to arrange airflow in a way that brings a
- > direct current of air across any one specified area.
- >
- > This is solved in negative-pressure systems by placing a vent
- > in such a way that the air coming in would blow over the area
- > to be cooled
- >
- > 2) Positive pressure airflow dynamics change the moment the physical
- > layout changes. Specifically, let's say we have a positive-airflow
- > 2000, with a vent on the left side of the case, next to all of the
- > slots. The problem here lies in that dropping in ONE card will cease
- > airflow across a huge expanse of the board now, and on top of that,
- > any expansion cards in the machine will be cooled very poorly.
- >
- > 3) It is extremely difficult for a positive-pressure system to cool a
- > large area properly without making use of more than one fan.
- >
- > These three problems are the reasons behind not using
- > positive-airflow, even if it makes your computer that much cleaner on
- > the inside.
- >
- > Greg
-
- Sooooo. When are we gonna hear from Commodore on this? I spoke to
- my dealer and they were aware of the problem but would not touch my
- machine until they get a "tech note" on how to fix it.
-
- I looked at the PS, and turning the fan around is not something I'd
- care to tackle while the machine is still under warranty.
-
- It looks like the PS itself will have to be opened (tedious) or
- replaced (easy).
-
- Is Commodore gonna let my A4000 blow up so I can then flame them for
- it? They're dragging their ass again. ;)
-
-
- >
- > --
- > (: (: (: (: Have you overdosed on smileys today? Why NOT!?! :) :) :) :)
- > (: "Our father, who art in Iowa, Hollow be thy head, Thy ideas run :)
- > (: Thy will be done, At Commodore as it is at Apple" -Dan Barrett :)
- > (: (: (: (: (: (: (: (: (: (: (: (: () :) :) :) Wubba, the Dark Angel :)
- Fred Heitkamp, ** Not an organization **
- ** These opinions represent no one else's, either living or dead or
- in between **
-